Master-last.



M. W. GREER.

MASTER LAST.

ION FILED S APFLICAT EPT. 7, 1916. 1,226,071. Patented May15 ,1917.

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MASTER-LAST, 7

Specification of Letters Patent.

Patented May 15, 1917.

Application filed September 7, 1916. Serial No. 118,820.

To all whom it may concern: a p

Be it known that I, MEDOREM WILLIAM (inner, a citizen of the UnitedStates of America, residing at New York city, county and State of NewYork, have invented a new and useful Master-Last, of which the followingis a specification.

My invention relates to new and useful improvements in the manufactureof master lasts, that is to say, a last which is suitably modeled byhand, or otherwise, and which is material that may be readily fashionedinto the desired shape. Plaster of Paris is one such material that maybesuccessfully employed by my improved construction. My improvedconstruction contemplates extending longitudinally through the materiala core, preferably metallic, which core has an irregular cross sectionat a suitable point or points intermediate its length, whereby when thecomposition of the body has hardened thereon, the core cannot be turnedwithout turning the body, that is to say, the core is locked thereinagainst movement in all. directions. In this instance, the corecomprises a pipe having two ends 23 and an intermediate flattenedportion 4, which gives to the same an irregular cross section that willlook into the body of the material when the latter is hardened. One endof the reinforcement, for example, the end 3, may

be notched to receive a pin or dog of a turning lathe, the centers ofwhich may be engaged with the ends of the reinforcement or core asrigidly as desired, so that when the lathe is turned the model or masterlast will be turned therewith, whereby the follower of the duplicatingmachine may be caused to traverse over the surface of the model. aroundand around from end to end. These last reproducing machines are too wellknown to require illustration herein. It is obvious that were the body 1not provided with an adequate reinforcement, the same would be liable tobe broken were it attempted to use the same in such a machine. By myimproved construction which includes the longitudinal reinforce, endwisepressure on the last is taken wholly by the core and thus damage orbreakage is completely avoided. To reinforce the external surface overwhich the follower of the last machine will travel, I provide an armor 5which comprises preferably a thin fabric covering which maybe'thoroughly impregnated with some hardening material such as glue,whereby whenflsaidglue sets, the surface of the bodyl will be made toughand resistant to the action of the said follower.

The fabric may be in the form of a thin seamless sock, which so closelyapproximates the design of the model, that it may be caused to tightlyadhere to the surface thereof so as to conform to every curve.

l/Vhat I claim is:

1. A master-last comprising a body formed of plastic compound of arelatively fragile material, a core extending longitudinally throughsaid last to reinforce the same against endwise crushing strain.

2. A master-last comprising a body formed of a plastic compound of arelatively fragile material, a core extending longitudinally throughsaid last to reinforce the same against endwise crushing strain, withmeansfor locking said core in said body against relative rotarymovement.

MEDOREM W. GREEK.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. 0.?

